The number of the quarters coins are 14. Then the correct option is C.
What is the solution of the equation?
The solution of the equation means the value of the unknown or variable.
Kat has 19 coins, all quarters and dimes, that are worth a total of $4.
The system of equations that can be used to find the number of quarters, q, and the number of dimes, d, she has is shown.
q + d = 19
d = 19 – q ...1
0.25q + 0.1d = 4 ...2
Solve the equation, we have
0.25q + 0.1(19 – q) = 4
0.25q – 0.1q + 1.9 = 4
0.15q = 2.1
q = 14
Then the correct option is C.
More about the solution of the equation link is given below.
https://brainly.com/question/545403
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